Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With the start of September, James City measures an average high-temperature of a warm 82.9°F (28.3°C), not significantly differing from August's 88°F (31.1°C). Throughout the month of September, the average temperature dips to an enjoyable 67.1°F (19.5°C) at night.Heat index
The heat index in September is appraised at a hot 91.4°F (33°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives an indication of how one might feel in terms of heat after considering humidity. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
In James City, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 12.7 days. Throughout September, 2.28" (58mm) of precipitation is accumulated. In James City, during the entire year, the rain falls for 151.4 days and collects up to 23.23" (590mm) of precipitation.Snowfall
In James City, North Carolina, snow does not fall in April through October and December.Daylight
The average length of the day in September in James City is 12h and 23min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:34 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:53 pm EDT.
Sunshine
The average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 6 in September leads to these recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in James City?
What is the average humidity in September in James City?
How much does it rain in James City in September?
When it does not snow in James City?
What is the average length of the day in September in James City?
When is the sunrise / sunset in September in James City?
How long on average sun shines in September in James City?
How high is the UV index in September in James City?
Average temperature in September
James City, NC
- Average high temperature in September: 82.9°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (51.4°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
James City, NC
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
James City, NC
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
James City, NC
- Average humidity in September: 78%
The months with the highest relative humidity are August and December (79%).
The month with the lowest relative humidity is April (74%).
Average rainfall in September
James City, NC
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is August (3.39").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
James City, NC
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is October (8.2 days).
Average snowfall in September
James City, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and December (0").
Average snowfall days in September
James City, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
James City, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
James City, NC
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is July (8.5 days).
Average UV index in September
James City, NC
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
James City, NC
- Average cloud cover in September: 37
The months with the most cloud cover are February, March and December (Cloud cover 43).
The month with the least cloud cover is June (Cloud cover 32).
Average visibility in September
James City, NC
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
James City, North Carolina, USA
Weather forecast for your location
2. Allow the app to use your location